Method for preparing landscaping soil from river sludge

The invention discloses a method for preparing landscaping soil from river sludge, and belongs to the technical field of sludge treatment. The method comprises the following steps: dehydrating, crushing and sieving river sludge to obtain sludge powder; the preparation method comprises the following steps: taking sludge powder, adding water glass in the stirring process, stirring for 30-50 seconds, adding a weak acid saturated solution, and continuously stirring for 60-80 seconds, so that the water glass fully wets the surface of the sludge powder; and adding the organic acid biological compound and the rice husk carbon, stirring at a high speed for 80-100 seconds to uniformly mix, spreading, airing, and maintaining at room temperature for 2-4 days to obtain the green planting soil. The landscaping planting soil prepared by the method has the advantages that the infiltration rate is high, the particle distribution gradient is obvious, the organic matter content and texture can meet the standard requirements of